Newb to Ubuntu

My Laptop

Dell (1stGen) XPS M140
2.3 Intel Centrio M
1G DDR
Intel 915gm Intergrated Graphics
so on...

Anyway, I am monitoring my CPU temps. At idle I am running 118 F, and about 150F while at heavy load, which the fan kicks into full speed. I already found the "disable" trick, but I want to set my fan to either 1: Run at full speed at all times 2: Change to default temp setting which the fan kicks into full speed. I already checked the BOIS and settings for the fan are not in there. Any help?